python中z3求解器的超时 [英] timeout for z3 solver in python

问题描述

我在为求解器设置超时时遇到问题:

s = Solver()编码 = parse_smt2_file("ex.smt2")s.add(编码)s.set("超时", 600)解决方案 = s.check()

但我收到以下错误

回溯(最近一次调用最后一次):文件/Users/X/Documents/encode.py"，第 145 行，在 parse_polyedra("file")文件/Users/X/Documents/encode.py"，第 108 行，在 parse_polyedra s.set("timeout",1) 文件/Users/X/z3/build/z3.py"，第 5765 行，在集合中Z3_solver_set_params(self.ctx.ref(), self.solver, p.params)文件/Users/X/z3/build/z3core.py"，第 3969 行，在 Z3_solver_set_params 中引发 Z3Exception(lib().Z3_get_error_msg_ex(a0, err))Z3Exception:未知参数超时"

出现合法参数列表，但 timeout 不是其中的一部分.我看了一下这篇文章，但问题不一样.据我了解，参数应该是可以接受的，只是稳定版可能不会超时，但是编译应该没有问题.

无论如何我安装了不稳定的分支并且问题仍然存在.

解决方案

我能够使用以下版本的超时选项(它实际上超时，并在优化的情况下返回最著名的解决方案):

>

Python 2.7.9(默认，2015 年 3 月 1 日，12:57:24)[GCC 4.9.2] 在 linux2 上输入帮助"、版权"、信用"或许可"以获取更多信息.>>>进口z3>>>s = z3.Solver()>>>s.set("超时", 600)>>>z3.get_version_string()'4.4.2'

I have problems setting a timeout for my solver:

s = Solver()
encoding = parse_smt2_file("ex.smt2")
s.add(encoding)

s.set("timeout", 600)
solution = s.check()

but I get the following error

Traceback (most recent call last): 
File "/Users/X/Documents/encode.py", line 145, in parse_polyedra("file") 
File "/Users/X/Documents/encode.py", line 108, in parse_polyedra s.set("timeout",1) File "/Users/X/z3/build/z3.py", line 5765, in set Z3_solver_set_params(self.ctx.ref(), self.solver, p.params) 
File "/Users/X/z3/build/z3core.py", line 3969, in Z3_solver_set_params raise Z3Exception(lib().Z3_get_error_msg_ex(a0, err)) 
Z3Exception: unknown parameter 'timeout'

A list of legal parameters appears, but timeout is not part of it. I took a look to this post, but the problem is not the same. As far as I understand, the parameter should be accepted, it is just that in the stable version the timeout may never happens, but there should not be problems to compile.

Anyway I installed the unstable branch and the problem persist.

解决方案

I was able to use the timeout option (and it actually timeouts, and returns the best known solution in the case of optimization) with the following versions:

Python 2.7.9 (default, Mar  1 2015, 12:57:24) 
[GCC 4.9.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import z3
>>> s = z3.Solver()
>>> s.set("timeout", 600)
>>> z3.get_version_string()
'4.4.2'

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